The IUTSumulator app crashes while parsing response to /oic/res if the response contains a link with "rel" being an array. After implementing 
BZ #3094
in the CTT, the simulator used in client test cases was updated to pass the new test case introduced in #3094. As part of that update the link to /oic/res was changed from "rel": "self" to "rel": ["self", "item"].
After a quick search in the sources, I've found that the source of this issue is in IoTivity API functions in ocpayloadparse.c which expect the "rel" property to be a string:
OCParseDiscoveryPayloadCbor:

// Rel - Not a mandatory field
err = cbor_value_map_find_value(&resourceMap, OC_RSRVD_REL, &curVal);
VERIFY_CBOR_SUCCESS_OR_OUT_OF_MEMORY(TAG, err, "to find rel tag");
if (cbor_value_is_valid(&curVal))
{
    err = cbor_value_dup_text_string(&curVal, &(resource->rel), &len, NULL);
    VERIFY_CBOR_SUCCESS_OR_OUT_OF_MEMORY(TAG, err, "to find rel value");
}

ParseResources:

// Rel - Not a mandatory field
err = cbor_value_map_find_value(resourceMap, OC_RSRVD_REL, &curVal);
VERIFY_CBOR_SUCCESS_OR_OUT_OF_MEMORY(TAG, err, "to find rel tag");
if (cbor_value_is_valid(&curVal))
{
    err = cbor_value_dup_text_string(&curVal, &(resource->rel), &len, NULL);
    VERIFY_CBOR_SUCCESS_OR_OUT_OF_MEMORY(TAG, err, "to find rel value");
}

When the code receives the "rel" as an array, the cbor_value_dup_text_string crashes the app with the following error:

IUTSimulator: extlibs/tinycbor/tinycbor/src/cbor.h:445: cbor_value_dup_text_string: Assertion `cbor_value_is_text_string(value)' failed.
Aborted (core dumped)

As per the current swagger definition of
oic.wk.res
, the "rel" proeprty of a link can be either a string or an array:

"rel": {
  "description": "The relation of the target URI referenced by the Link to the context URI",
  "oneOf": [
    {
      "$ref": "https://openconnectivityfoundation.github.io/core/schemas/oic.links.properties.core-schema.json#/definitions/rel_array"
    },
    {
      "$ref": "https://openconnectivityfoundation.github.io/core/schemas/oic.links.properties.core-schema.json#/definitions/rel_string"
    }
  ]
},

The IoTivity API implementation needs to be updated to account for that.

JIRA migration meta data

• JIRA Issue ID: IOT-3303
• Reporter: krzysztof.j.wlodarczyk
• Assignee: nathanheldtsheller
• Creator: krzysztof.j.wlodarczyk
• Created at: 2019-11-05T02:15:05.000-0800
• Found in Version: master
• Fix in Version: None
• Issue Severity: Major
• Reproducibility: Always (100%)
• Operating System: Ubuntu
• Hardware/ OEM Platform: None
• External URL: None
• Bugzilla ID: None
• Product: None
• Status: Open
• Components: Discovery/Connectivity
• Priority: P1
• Due Date: None
• Issue Type: Bug
  END of JIRA migration meta data